Underneath the Crystallized city, there are many tunnels. Many of the citizens come to visit the tunnels just for fun. There is nothing dangerous in the tunnels, just a citizen may lose their sense of direction. The tunnels are easily accessed from certain locations. There is a large opening located at the beach. That is where many of the citizens go to get into the tunnels. There is also a secret door behind the announcement board, covered by many of the weeds. Certain homes and businesses have secret passages into the underground tunnels as well.